1992 •
On the modification of the optical properties of the TCNQ ion-radical salts by mechanical grinding
Authors: G.C. Papavassiliou, V.M. Yartsev
Venue: Chemical Physics Letters
Type: Publication
Abstract: Abstract Absorption spectra of small K—TCNQ particles are interpreted in terms of the Hubbard model for a linear cluster of four molecules with four electrons. The shift of the electronic excitation band to higher frequency versus decrease of particle size is attributed to the growth of the on-site Coulomb repulsion energy due to less effective screening.
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